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Theoretical and experimental investigations of broadband thermoelastically generated ultrasonic pulses

 

Hess, P.; Pelzl, J.:
Photoacoustic and Photothermal Phenomena 1987
Berlin/West: Springer, 1988
S.284-287
International Topical Meeting on Photoacoustic and Photothermal Phenomena <5, 1987, Heidelberg>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
experiment; kurze Laserpulse; quantitatives theoretisches Modell; Thermoelastischer Effekt; Ultraschallerzeugung; Winkelcharakteristik; zeitlicher Signalverlauf

Abstract
Broadband ultrasonic pulses can be remotely generated by short laser pulses at solid surfaces via the thermoelastic effect and by ablation of surface material. Such a technique might be a viable tool in nondestructive evaluation. This contribution firstly outlines the elements of a hitherto lacking three-dimensional theory of thermoelastic sound generation and secondly a comparison with experimental results is given.

: http://publica.fraunhofer.de/dokumente/PX-36285.html